I just today managed to get my first Sabayon to boot, after fighting with an Ubuntu bootloader that did not properly auto-detected Sabayon, but after a day or two of google and testing it is now finally booting. The bootloader (or Sabayon) autodetect choose wrong disc etc. in the grub-menu. Anyhow, Im live, I thought... starting the first time, I had some 460+ updates, with the note on "Application updates" that I have an outdated version of sys/entropy and that I should upgrade to the latest before doing anything. Well and fine, I find "Entropy store" search for "entropy" and finds 1.0_rc79. Click on install and unfortunately it fails.

The key hint was to use emerge to upgrade portage, which somehow was coupled to entropy, rather than an entropy update.Once it was done, I ran the (first) great system update. The system now claims it is up to date, and seems to work.